title: Sequential subtraction for improved display of cerebrovascular occlusions.
mesh_terms: D002539:Cerebral Arterial Diseases / Q000000981:diagnostic imaging; D002561:Cerebrovascular Disorders / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D013382:Subtraction Technique